USGS Open-File Report 03-039

Table 13. Probability distribution of volumetric parameters for oil and gas in Brookian Clinoform South-Shallow Play.

Attribute	Units	LTP*	F₅₀	F₀₅	Max
Net Reservoir Thickness	feet	50	75	200	400
Area of Closure	1000 acres	5	7	20	40
Trap Fill	percent	80	100	100	100
Porosity	percent	10	14	18	20
Porosity-Water Saturation Product	percent					6
Hydrocarbon Pore Volume	percent	4	8	12	14

		Min	F₅₀	F₀₅	Max
Trap Depth (oil)	1000 feet	3	6	9	10
Trap Depth (gas)	1000 feet	6	10	13	14
Number of Prospects	number	20	40	60	100
Total Play Area	million acres					7.5

*LTP is lower truncation point for input distribution (see Scheunemeyer, this volume).

Table 14. Probability of occurrence for play and prospect in the Brookian Clinoform South-Shallow Play.

Play Attributes
Charge (C)	1.0
Trap (T)	1.0
Timing (F)	1.0
Play Probability (CxTxF)		1.00

Prospect Attributes
Charge (c)	0.7
Trap (t)	0.2
Timing (f)	1
Prospect Probability (CxTxF)		0.14

Play Probability x Prospect Probability		0.14

Fraction of Accumulations That Are Oil	0.5